1、 (数据库设计如上)
2、代码：
private void SetArea()
{
DataTable dt = new DataTable();
dt = customer.GetArea();
DataView dv = dt.DefaultView;
DataTable dtProvince = dv.ToTable(true, "province", "provinceid");
for (int i = 0; i < dtProvince.Rows.Count; i++)
{
TreeNode nd = new TreeNode();
nd.Tag = dtProvince.Rows[i]["provinceid"].ToString();
nd.Text = dtProvince.Rows[i]["province"].ToString();
TreeArea.Nodes.Add(nd);
//插入子节点
CreateTreeNode(ref nd, dt);
TreeArea.ExpandAll();
TreeArea.CheckBoxes = true;
}
}
private void CreateTreeNode(ref TreeNode tnParent, DataTable dt)
{
DataRow[] drArr = dt.Select("provinceid = '" + tnParent.Tag + "'");
if (drArr.Length == 0) return;
for (int i = 0; i < drArr.Length; i++)
{
DataRow row = drArr[i];
TreeNode nd = new TreeNode();
nd.Tag = row["purchaseid"].ToString();
nd.Text = row["areaname"].ToString();
tnParent.Nodes.Add(nd);
CreateTreeNode(ref nd, dt);
}
}
3、运行结果：
